Grinding mill



Nov. 20, 1945. M. M. SPANEL 2,389,242

GRINDIN G MILL Filed Dec. 9, 1943 4 Sheets-Sheet l 7 E V Q ("It Q? l r:

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Nov, 20, 1945. M, SPANEL 2,389,242

GRINDING- MILL Filed-Dec. 9, 194s 4 Sheets-Sheet 3 Nov. 20, 1945. M, M PA 2,389,242

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Patented Nov. 20, 1945 GRINDING MILL Martin M. Spancl, Flint, Mich.

I Application December 9, 1943, Serial No. 513,502

3 Claims.

This invention relates to a grinding mill designed primarily for the grinding of paint, and the invention has for its primary object the provision of a mill of this kind which is so constructed as to provide for expeditious and economical grinding of paint in a thoroughly satisfactory manner.

More specifically, objects of the invention are to provide a grinding mill which is simple in construction, durable, compact, thoroughly eflicient in use, conveniently operated, and inexpensive to manufacture and assemble.

Specific objects and features of the invention will become apparent from the following description when considered in connection with the accompanying drawings, and the invention consists in the novel form, combination and arrangement of parts hereinafter more fully described, shown in said drawings and claimed.

In the drawings, wherein like reference characters indicate corresponding parts throughout the several views:

Figure 1 is a front elevational view of a horizontal type of grinding mill constructed in accordance with the present invention.

Figure 2 is a central vertical sectional view thereof taken on line 2-2 of Figure 1.

Figure 3 is a fragmentary detail section taken on line 33 of Figure 2.

Figure 4 isa fragmentary enlarged elevational view looking toward the left of Figure 2.

Figure 5 is a view similar .to Figure 2, of a vertical type of grinding mill constructed-in accordance with the present invention.

Figure 6 is a top plan .view thereof with the reducing gearing omitted.

Figure '7 is a horizontal section taken on line 1---'! of Figure 5, and

Figure 8 is a fragmentary detail section through the casing, taken on the plane of line t-8 of Figure 5, and showing the drain outlet for the ground material.

Referring more in detail to the drawings, the present grinding mill includes a casing having a circular wall 5 of frusto-conical form, enclosed at its smaller end by a wall 6 whose inner surface of its marginal or outer portion is of conical form and disposedat right angles to thesurface of the wall 5, as at I. At the lowermost part of the casing, the latter is provided with an outlet opening 8 for draining or discharging the ground material therefrom, and associated with this opening is a manually openable closure gate 9. A discharge spout I0 is provided on the casing outwardly of the opening 8 to properly cause the discharged ground material to flow into a col;- lection receptacle. 1

Journaled centrally of the end Wall '6 is a shaft ll having a squared inner end l2 projecting into the adjacent end ofthe casing and having secured thereon the hub I3 of a carrier embodying a circular series of channel-shaped holder arms I 4 that project in diverging relation from the hub l3 toward the opposite end of the :casing,or.-t he larger end of the latter. At the inner sides of the holder arms and at theirrinner portions, said arms are provided with longitudinal'vanes [5, whereby the carrier may act as a stirrer for'thoroughly mixing the material to beground as; said carrier is rotated during thegrinding-operatiom The holder arms Mare of semi-circular contour, and loosely and revolubly mounted in each hold er arm in positionto engage the-inner surface of the casing wall 5 is a cylinder grinding rollit, which may be in one piece or ina plurality-of transverse sections, as desired. The single or onepiece type of roll is illustrated in Figure 2; and the sectional type of roll is shown in-Figure -57. As shown clearly in Figures 2, Sand .6, each-holder preferably has a liner I! of smooth wear-resist-v ing material. v

A suitable packing means is provided'at. ll to prevent leakage of material from thecas'ing about the shaft H where I the latter extends through the wall 6, and on the outside of said wall there is provided a gear casing I8. This casing ispreferably of grease-tight construction to house gear ing between the shaft H and a drive shaft pro Jecting into said housing l8 transverselyof shaft II. This gearing may include a large bevel gear I '9 secured on shaft ll within the housing H3.-v V

In Figures 1 to 4, inclusive, there is'showna horizontal type of grinding mill embodyingthe present invention, wherein the larger end of the casing is closed by a removable wall 20 provided in its lower portion .with the outlet Opening-8 and having at its upper portion an open top feed hopper 2| provided with a ;top closure 22 =1and adapted to facilitate the introduction of the material to be ground to the casing; v-In; this embodiment, the wall 5 is shown'as having a water end thereot engaging said wheel 21. Thus by V threading the wheel 2! outwardly, the shaft H may be correspondingly moved to draw the carrier in the same direction and to cause the-roll ers 16 to bear more tightly against the conical" wall iof the casing. Any suitablemeans such M as dog 29 arranged to engage teeth or notches30 of the wheel 21, may be provided lookingthe" latter in adjusted position.

In Figures 5 to 8, inclusive, there is showna verticaltypeofgrinding mill embodying thepres ent invention. In this embodiment;--the casing wall 5 preferably-has e -'cylindrical' extension at th'etop {thereof 'txt'ending above the rolls I I and I their carriers Also; the casing is mounted upon a suitable lease such-as a- --lar'ge cylindrical standard having a large base flange-33;

, this emhodi'ment the shaft-'1' F depends within the standard seam is'providedatits lower end with af hall and socket connection 33 -with-a pivoted rm that; extendsoutwardly "through aside of thestandard and -is pivotally connected to' an adiusting serew ti rotatably mounted on the outside of standard 32.- -By adjusting-screw 35', annifmaybeswung so-as to shiftish'aft H'lon' gitudin'ally and correspondingly move the roll carrier for varying the degree" of pressure with which said rolls engage the we1r 5 of the casing, therehywarying the finenessof the material being ground; Driving 0! the-shaft I lin-this'embodimerit mayheaccomplished'hy abevel gearing- 36 within the standard-"32andconnecting said shaft H with a horl'zontal shaft [2 extendinglroma reducing-gearing containeddhhousing 31}: As the-degreeof longitudinal adjustment of sha ftl l necessary to cause the desired variationof grind ingis slight,- such adii-istn'ien'te 'f-shalt H will not interfere with-constant meshing off the gearing between shaft l l and -its-driveshaft I I? M'nclrof the detail construction ofboth einbodiments is similar;- and corresponding parts of bothsforms are indicated by like reference num; a, c.

- Inoper'atiom rotary motion is given to shaft jl l so as to remainswitnesses-causesmegma ing rolls 48;- which bear upon the innersurfac'e of-wall fi terot'ate and roll around within-the casing.- GentrifugaI force; assisted by the conical form of the-casing-and tlie diverging relation of the'rolls', insures contact of the -1'aftt'er with the inner surface-6f casing-M11 5; and the pressure 0! said-contact may be vai'iedthe means described. fln thiszjway, th'e material introduced within the casing wi1l be effectively 1 ground tween thesurtaces ot the rollsand-the inner sur face of easing wall 5 as 'well 'as between the surfacescr me-rolls and-the -linings i 1' of holders I 4-. If desired; the wali-5 may also haven smooth wear-resisting linen as at-il From thfilregoing des'o-ription; it is believed that theconstructionand operation; as wellas the advantages of the present invention, will be readily understood and appreciated by those skilled in the art. The invention provides a mill which will grind the paint in a thorough eflicient manner, and complete drainage of ground material from the casing is provided for. Changes in details of construction are contemplated such as fairly fall within the spirit and scope of the invention as claimed.

7 What! claim as new is: 1 v;

Wlr'A grindingnmachine comprising' -a casing having a circular wall of frusto-conical form and .Jprovided with a wall for closing the smaller end thereof, the last-mentioned wall having a conical'marginal inner surface portion extending at right anglesto the inner surface of said circular wall, a shaft journaled centrally in the end wall and-havingan end--pfojecting into the adjacent end ofthe casing, a carrier including a hub fixed on the inner end of said shaft within the casing and including: carrier arms ;.pro iecting from the 'hub in diverging'relation toward the other end-of "the casing, said arms 1 comprising "semi-circular channel -members; cylindrical-grinding irolls 'ro 'tat'ably fitting in said arm in'positio'n to contact and roll \uponthe-inner surface of i said: circular wall of the casing, and longitudinal mixing blades onthe innersidesof said-holder arms.

2. -'A grinding machine comprising a casing havinga circular wall of frusto-conicalform Sand provided with a wall for-closing the smaller end.

thereof, 1 the last-mentioned wall having a, conical marginal inner'surface portion extending at rigm angles: to the inner :surface of said circular wall, a shaft journaled centrallyin.th endiwall and having 1 an end "projecting into theadjacentend of the casing, a carri'er including a hub fixed on the inner end of said shaftwithin'the casing: and including carrier arms projecting from the hub in diverging :relationtoward the other: end of the casing, said arms comprising semi-circular: channel members, cylindrical i grinding rolls' rotatably fitting in saidarms in position: to contact and "roll upon the innensurfacefof .said circularwallofthe casing, and" longitudinal mixing blades. on the inner sides of saidlioldeiarms; and means'tcadjust said shaft lorigitudinallytd: correspondingly shift the carrier and therbyvary :thedegree .of pressure with whichithe' 1011s engage'the inner surface of saidcii cularwall. a f f 3. A grinding "machine comprising a casing havingia circular wall of frustoi-conicalifo'rmand provided with aIwall .for' closing: the smaller end thereof, the last-mentionedwall-having a-conical marginal inner surface portionsextending at right angles to the inn'ersuriace of said circular wall, a shaft journaled centrally insth end wall and having .an 'end: projecting intotthes adjacent end of th'ei'casing, a carrierincludingra'huhfixed-on the inner end of'said shaft within thecasingiand including carrier arms projectingfrom:the;hub in diverging relation towardthe othenend of rthe i g a d arms: c m risi m r i qu r, 6. 8 37 1161. m b s s ri a r din r l ia ab y fitting in said arms in-position to contact and roll upon the inner, surface/of said circular wall of the casing; and longitudinalmixingblades on the innerfsi'des offsaid holder arms, said ca'sin'gfhav; ing' a discharge opening anda closure therefor.

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